Oh, that is another issue: % is also special in make's language — it is used in forming patterns, where GNU make has excellent support and I do not know about dmake. I would strongly recommend passing a number (as I offered in Re^4: Defining an XS symbol in the Makefile.PL and Re^8: Defining an XS symbol in the Makefile.PL; you can combine the techniques and use the "odd" probe code with the "later" XS code to build the format from LU_NV_PREC) instead of trying to get a complete format string from Makefile.PL to XS code through a command-line option.

In reply to Re^2: Defining an XS symbol in the Makefile.PL (largely solved) by jcb
in thread Defining an XS symbol in the Makefile.PL by syphilis

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